On Mon, Nov 3, 2014 at 11:34 PM, Hans de Goede <hdego...@redhat.com> wrote:
> In preparation for adding sun6i dram support.
>
> Signed-off-by: Hans de Goede <hdego...@redhat.com>
> ---
>  arch/arm/cpu/armv7/sunxi/Makefile            |   6 +-
>  arch/arm/cpu/armv7/sunxi/dram.c              | 750 
> ---------------------------
>  arch/arm/cpu/armv7/sunxi/dram_sun4i.c        | 750 
> +++++++++++++++++++++++++++
>  arch/arm/include/asm/arch-sunxi/dram.h       | 171 +-----
>  arch/arm/include/asm/arch-sunxi/dram_sun4i.h | 182 +++++++
>  5 files changed, 941 insertions(+), 918 deletions(-)
>  delete mode 100644 arch/arm/cpu/armv7/sunxi/dram.c
>  create mode 100644 arch/arm/cpu/armv7/sunxi/dram_sun4i.c
>  create mode 100644 arch/arm/include/asm/arch-sunxi/dram_sun4i.h

Probably be better to run "git format-patch" with "-M" so it doesn't
generate a whole diff. Though it doesn't make much of a difference
since you'll be the one committing and pushing, it does make the
mail shorter and easier to read. :)

ChenYu

>
> diff --git a/arch/arm/cpu/armv7/sunxi/Makefile 
> b/arch/arm/cpu/armv7/sunxi/Makefile
> index b3a3601..48cca0b 100644
> --- a/arch/arm/cpu/armv7/sunxi/Makefile
> +++ b/arch/arm/cpu/armv7/sunxi/Makefile
> @@ -28,9 +28,9 @@ endif
>  endif
>
>  ifdef CONFIG_SPL_BUILD
> -obj-$(CONFIG_MACH_SUN4I)       += dram.o
> -obj-$(CONFIG_MACH_SUN5I)       += dram.o
> -obj-$(CONFIG_MACH_SUN7I)       += dram.o
> +obj-$(CONFIG_MACH_SUN4I)       += dram_sun4i.o
> +obj-$(CONFIG_MACH_SUN5I)       += dram_sun4i.o
> +obj-$(CONFIG_MACH_SUN7I)       += dram_sun4i.o
>  ifdef CONFIG_SPL_FEL
>  obj-y  += start.o
>  endif
> diff --git a/arch/arm/cpu/armv7/sunxi/dram.c b/arch/arm/cpu/armv7/sunxi/dram.c
> deleted file mode 100644
> index dc9fdb9..0000000
> --- a/arch/arm/cpu/armv7/sunxi/dram.c
> +++ /dev/null
> @@ -1,750 +0,0 @@
> -/*
> - * sunxi DRAM controller initialization
> - * (C) Copyright 2012 Henrik Nordstrom <hen...@henriknordstrom.net>
> - * (C) Copyright 2013 Luke Kenneth Casson Leighton <l...@lkcl.net>
> - *
> - * Based on sun4i Linux kernel sources mach-sunxi/pm/standby/dram*.c
> - * and earlier U-Boot Allwiner A10 SPL work
> - *
> - * (C) Copyright 2007-2012
> - * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
> - * Berg Xing <bergx...@allwinnertech.com>
> - * Tom Cubie <tangli...@allwinnertech.com>
> - *
> - * SPDX-License-Identifier:    GPL-2.0+
> - */
> -
> -/*
> - * Unfortunately the only documentation we have on the sun7i DRAM
> - * controller is Allwinner boot0 + boot1 code, and that code uses
> - * magic numbers & shifts with no explanations. Hence this code is
> - * rather undocumented and full of magic.
> - */
> -
> -#include <common.h>
> -#include <asm/io.h>
> -#include <asm/arch/clock.h>
> -#include <asm/arch/dram.h>
> -#include <asm/arch/timer.h>
> -#include <asm/arch/sys_proto.h>
> -
> -#define CPU_CFG_CHIP_VER(n) ((n) << 6)
> -#define CPU_CFG_CHIP_VER_MASK CPU_CFG_CHIP_VER(0x3)
> -#define CPU_CFG_CHIP_REV_A 0x0
> -#define CPU_CFG_CHIP_REV_C1 0x1
> -#define CPU_CFG_CHIP_REV_C2 0x2
> -#define CPU_CFG_CHIP_REV_B 0x3
> -
> -/*
> - * Wait up to 1s for value to be set in given part of reg.
> - */
> -static void await_completion(u32 *reg, u32 mask, u32 val)
> -{
> -       unsigned long tmo = timer_get_us() + 1000000;
> -
> -       while ((readl(reg) & mask) != val) {
> -               if (timer_get_us() > tmo)
> -                       panic("Timeout initialising DRAM\n");
> -       }
> -}
> -
> -/*
> - * Wait up to 1s for mask to be clear in given reg.
> - */
> -static inline void await_bits_clear(u32 *reg, u32 mask)
> -{
> -       await_completion(reg, mask, 0);
> -}
> -
> -/*
> - * Wait up to 1s for mask to be set in given reg.
> - */
> -static inline void await_bits_set(u32 *reg, u32 mask)
> -{
> -       await_completion(reg, mask, mask);
> -}
> -
> -/*
> - * This performs the external DRAM reset by driving the RESET pin low and
> - * then high again. According to the DDR3 spec, the RESET pin needs to be
> - * kept low for at least 200 us.
> - */
> -static void mctl_ddr3_reset(void)
> -{
> -       struct sunxi_dram_reg *dram =
> -                       (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
> -
> -#ifdef CONFIG_MACH_SUN4I
> -       struct sunxi_timer_reg *timer =
> -                       (struct sunxi_timer_reg *)SUNXI_TIMER_BASE;
> -       u32 reg_val;
> -
> -       writel(0, &timer->cpu_cfg);
> -       reg_val = readl(&timer->cpu_cfg);
> -
> -       if ((reg_val & CPU_CFG_CHIP_VER_MASK) !=
> -           CPU_CFG_CHIP_VER(CPU_CFG_CHIP_REV_A)) {
> -               setbits_le32(&dram->mcr, DRAM_MCR_RESET);
> -               udelay(200);
> -               clrbits_le32(&dram->mcr, DRAM_MCR_RESET);
> -       } else
> -#endif
> -       {
> -               clrbits_le32(&dram->mcr, DRAM_MCR_RESET);
> -               udelay(200);
> -               setbits_le32(&dram->mcr, DRAM_MCR_RESET);
> -       }
> -       /* After the RESET pin is de-asserted, the DDR3 spec requires to wait
> -        * for additional 500 us before driving the CKE pin (Clock Enable)
> -        * high. The duration of this delay can be configured in the SDR_IDCR
> -        * (Initialization Delay Configuration Register) and applied
> -        * automatically by the DRAM controller during the DDR3 initialization
> -        * step. But SDR_IDCR has limited range on sun4i/sun5i hardware and
> -        * can't provide sufficient delay at DRAM clock frequencies higher 
> than
> -        * 524 MHz (while Allwinner A13 supports DRAM clock frequency up to
> -        * 533 MHz according to the datasheet). Additionally, there is no
> -        * official documentation for the SDR_IDCR register anywhere, and
> -        * there is always a chance that we are interpreting it wrong.
> -        * Better be safe than sorry, so add an explicit delay here. */
> -       udelay(500);
> -}
> -
> -static void mctl_set_drive(void)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -
> -#ifdef CONFIG_MACH_SUN7I
> -       clrsetbits_le32(&dram->mcr, DRAM_MCR_MODE_NORM(0x3) | (0x3 << 28),
> -#else
> -       clrsetbits_le32(&dram->mcr, DRAM_MCR_MODE_NORM(0x3),
> -#endif
> -                       DRAM_MCR_MODE_EN(0x3) |
> -                       0xffc);
> -}
> -
> -static void mctl_itm_disable(void)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -
> -       clrsetbits_le32(&dram->ccr, DRAM_CCR_INIT, DRAM_CCR_ITM_OFF);
> -}
> -
> -static void mctl_itm_enable(void)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -
> -       clrbits_le32(&dram->ccr, DRAM_CCR_ITM_OFF);
> -}
> -
> -static void mctl_itm_reset(void)
> -{
> -       mctl_itm_disable();
> -       udelay(1); /* ITM reset needs a bit of delay */
> -       mctl_itm_enable();
> -       udelay(1);
> -}
> -
> -static void mctl_enable_dll0(u32 phase)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -
> -       clrsetbits_le32(&dram->dllcr[0], 0x3f << 6,
> -                       ((phase >> 16) & 0x3f) << 6);
> -       clrsetbits_le32(&dram->dllcr[0], DRAM_DLLCR_NRESET, 
> DRAM_DLLCR_DISABLE);
> -       udelay(2);
> -
> -       clrbits_le32(&dram->dllcr[0], DRAM_DLLCR_NRESET | DRAM_DLLCR_DISABLE);
> -       udelay(22);
> -
> -       clrsetbits_le32(&dram->dllcr[0], DRAM_DLLCR_DISABLE, 
> DRAM_DLLCR_NRESET);
> -       udelay(22);
> -}
> -
> -/* Get the number of DDR byte lanes */
> -static u32 mctl_get_number_of_lanes(void)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       if ((readl(&dram->dcr) & DRAM_DCR_BUS_WIDTH_MASK) ==
> -                               DRAM_DCR_BUS_WIDTH(DRAM_DCR_BUS_WIDTH_32BIT))
> -               return 4;
> -       else
> -               return 2;
> -}
> -
> -/*
> - * Note: This differs from pm/standby in that it checks the bus width
> - */
> -static void mctl_enable_dllx(u32 phase)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       u32 i, number_of_lanes;
> -
> -       number_of_lanes = mctl_get_number_of_lanes();
> -
> -       for (i = 1; i <= number_of_lanes; i++) {
> -               clrsetbits_le32(&dram->dllcr[i], 0xf << 14,
> -                               (phase & 0xf) << 14);
> -               clrsetbits_le32(&dram->dllcr[i], DRAM_DLLCR_NRESET,
> -                               DRAM_DLLCR_DISABLE);
> -               phase >>= 4;
> -       }
> -       udelay(2);
> -
> -       for (i = 1; i <= number_of_lanes; i++)
> -               clrbits_le32(&dram->dllcr[i], DRAM_DLLCR_NRESET |
> -                            DRAM_DLLCR_DISABLE);
> -       udelay(22);
> -
> -       for (i = 1; i <= number_of_lanes; i++)
> -               clrsetbits_le32(&dram->dllcr[i], DRAM_DLLCR_DISABLE,
> -                               DRAM_DLLCR_NRESET);
> -       udelay(22);
> -}
> -
> -static u32 hpcr_value[32] = {
> -#ifdef CONFIG_MACH_SUN5I
> -       0, 0, 0, 0,
> -       0, 0, 0, 0,
> -       0, 0, 0, 0,
> -       0, 0, 0, 0,
> -       0x1031, 0x1031, 0x0735, 0x1035,
> -       0x1035, 0x0731, 0x1031, 0,
> -       0x0301, 0x0301, 0x0301, 0x0301,
> -       0x0301, 0x0301, 0x0301, 0
> -#endif
> -#ifdef CONFIG_MACH_SUN4I
> -       0x0301, 0x0301, 0x0301, 0x0301,
> -       0x0301, 0x0301, 0, 0,
> -       0, 0, 0, 0,
> -       0, 0, 0, 0,
> -       0x1031, 0x1031, 0x0735, 0x5031,
> -       0x1035, 0x0731, 0x1031, 0x0735,
> -       0x1035, 0x1031, 0x0731, 0x1035,
> -       0x1031, 0x0301, 0x0301, 0x0731
> -#endif
> -#ifdef CONFIG_MACH_SUN7I
> -       0x0301, 0x0301, 0x0301, 0x0301,
> -       0x0301, 0x0301, 0x0301, 0x0301,
> -       0, 0, 0, 0,
> -       0, 0, 0, 0,
> -       0x1031, 0x1031, 0x0735, 0x1035,
> -       0x1035, 0x0731, 0x1031, 0x0735,
> -       0x1035, 0x1031, 0x0731, 0x1035,
> -       0x0001, 0x1031, 0, 0x1031
> -       /* last row differs from boot0 source table
> -        * 0x1031, 0x0301, 0x0301, 0x0731
> -        * but boot0 code skips #28 and #30, and sets #29 and #31 to the
> -        * value from #28 entry (0x1031)
> -        */
> -#endif
> -};
> -
> -static void mctl_configure_hostport(void)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       u32 i;
> -
> -       for (i = 0; i < 32; i++)
> -               writel(hpcr_value[i], &dram->hpcr[i]);
> -}
> -
> -static void mctl_setup_dram_clock(u32 clk, u32 mbus_clk)
> -{
> -       u32 reg_val;
> -       struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
> -       u32 pll5p_clk, pll6x_clk;
> -       u32 pll5p_div, pll6x_div;
> -       u32 pll5p_rate, pll6x_rate;
> -
> -       /* setup DRAM PLL */
> -       reg_val = readl(&ccm->pll5_cfg);
> -       reg_val &= ~CCM_PLL5_CTRL_M_MASK;               /* set M to 0 (x1) */
> -       reg_val &= ~CCM_PLL5_CTRL_K_MASK;               /* set K to 0 (x1) */
> -       reg_val &= ~CCM_PLL5_CTRL_N_MASK;               /* set N to 0 (x0) */
> -       reg_val &= ~CCM_PLL5_CTRL_P_MASK;               /* set P to 0 (x1) */
> -#ifdef CONFIG_OLD_SUNXI_KERNEL_COMPAT
> -       /* Old kernels are hardcoded to P=1 (divide by 2) */
> -       reg_val |= CCM_PLL5_CTRL_P(1);
> -#endif
> -       if (clk >= 540 && clk < 552) {
> -               /* dram = 540MHz */
> -               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
> -               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
> -               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(15));
> -       } else if (clk >= 512 && clk < 528) {
> -               /* dram = 512MHz */
> -               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3));
> -               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(4));
> -               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(16));
> -       } else if (clk >= 496 && clk < 504) {
> -               /* dram = 496MHz */
> -               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3));
> -               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(2));
> -               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(31));
> -       } else if (clk >= 468 && clk < 480) {
> -               /* dram = 468MHz */
> -               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
> -               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
> -               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(13));
> -       } else if (clk >= 396 && clk < 408) {
> -               /* dram = 396MHz */
> -               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
> -               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
> -               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(11));
> -       } else  {
> -               /* any other frequency that is a multiple of 24 */
> -               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
> -               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(2));
> -               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(clk / 24));
> -       }
> -       reg_val &= ~CCM_PLL5_CTRL_VCO_GAIN;             /* PLL VCO Gain off */
> -       reg_val |= CCM_PLL5_CTRL_EN;                    /* PLL On */
> -       writel(reg_val, &ccm->pll5_cfg);
> -       udelay(5500);
> -
> -       setbits_le32(&ccm->pll5_cfg, CCM_PLL5_CTRL_DDR_CLK);
> -
> -#if defined(CONFIG_MACH_SUN4I) || defined(CONFIG_MACH_SUN7I)
> -       /* reset GPS */
> -       clrbits_le32(&ccm->gps_clk_cfg, CCM_GPS_CTRL_RESET | 
> CCM_GPS_CTRL_GATE);
> -       setbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_GPS);
> -       udelay(1);
> -       clrbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_GPS);
> -#endif
> -
> -       /* setup MBUS clock */
> -       if (!mbus_clk)
> -               mbus_clk = 300;
> -
> -       /* PLL5P and PLL6 are the potential clock sources for MBUS */
> -       pll6x_clk = clock_get_pll6() / 1000000;
> -#ifdef CONFIG_MACH_SUN7I
> -       pll6x_clk *= 2; /* sun7i uses PLL6*2, sun5i uses just PLL6 */
> -#endif
> -       pll5p_clk = clock_get_pll5p() / 1000000;
> -       pll6x_div = DIV_ROUND_UP(pll6x_clk, mbus_clk);
> -       pll5p_div = DIV_ROUND_UP(pll5p_clk, mbus_clk);
> -       pll6x_rate = pll6x_clk / pll6x_div;
> -       pll5p_rate = pll5p_clk / pll5p_div;
> -
> -       if (pll6x_div <= 16 && pll6x_rate > pll5p_rate) {
> -               /* use PLL6 as the MBUS clock source */
> -               reg_val = CCM_MBUS_CTRL_GATE |
> -                         CCM_MBUS_CTRL_CLK_SRC(CCM_MBUS_CTRL_CLK_SRC_PLL6) |
> -                         CCM_MBUS_CTRL_N(CCM_MBUS_CTRL_N_X(1)) |
> -                         CCM_MBUS_CTRL_M(CCM_MBUS_CTRL_M_X(pll6x_div));
> -       } else if (pll5p_div <= 16) {
> -               /* use PLL5P as the MBUS clock source */
> -               reg_val = CCM_MBUS_CTRL_GATE |
> -                         CCM_MBUS_CTRL_CLK_SRC(CCM_MBUS_CTRL_CLK_SRC_PLL5) |
> -                         CCM_MBUS_CTRL_N(CCM_MBUS_CTRL_N_X(1)) |
> -                         CCM_MBUS_CTRL_M(CCM_MBUS_CTRL_M_X(pll5p_div));
> -       } else {
> -               panic("Bad mbus_clk\n");
> -       }
> -       writel(reg_val, &ccm->mbus_clk_cfg);
> -
> -       /*
> -        * open DRAMC AHB & DLL register clock
> -        * close it first
> -        */
> -#if defined(CONFIG_MACH_SUN5I) || defined(CONFIG_MACH_SUN7I)
> -       clrbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM | CCM_AHB_GATE_DLL);
> -#else
> -       clrbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM);
> -#endif
> -       udelay(22);
> -
> -       /* then open it */
> -#if defined(CONFIG_MACH_SUN5I) || defined(CONFIG_MACH_SUN7I)
> -       setbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM | CCM_AHB_GATE_DLL);
> -#else
> -       setbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM);
> -#endif
> -       udelay(22);
> -}
> -
> -/*
> - * The data from rslrX and rdgrX registers (X=rank) is stored
> - * in a single 32-bit value using the following format:
> - *   bits [31:26] - DQS gating system latency for byte lane 3
> - *   bits [25:24] - DQS gating phase select for byte lane 3
> - *   bits [23:18] - DQS gating system latency for byte lane 2
> - *   bits [17:16] - DQS gating phase select for byte lane 2
> - *   bits [15:10] - DQS gating system latency for byte lane 1
> - *   bits [ 9:8 ] - DQS gating phase select for byte lane 1
> - *   bits [ 7:2 ] - DQS gating system latency for byte lane 0
> - *   bits [ 1:0 ] - DQS gating phase select for byte lane 0
> - */
> -static void mctl_set_dqs_gating_delay(int rank, u32 dqs_gating_delay)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       u32 lane, number_of_lanes = mctl_get_number_of_lanes();
> -       /* rank0 gating system latency (3 bits per lane: cycles) */
> -       u32 slr = readl(rank == 0 ? &dram->rslr0 : &dram->rslr1);
> -       /* rank0 gating phase select (2 bits per lane: 90, 180, 270, 360) */
> -       u32 dgr = readl(rank == 0 ? &dram->rdgr0 : &dram->rdgr1);
> -       for (lane = 0; lane < number_of_lanes; lane++) {
> -               u32 tmp = dqs_gating_delay >> (lane * 8);
> -               slr &= ~(7 << (lane * 3));
> -               slr |= ((tmp >> 2) & 7) << (lane * 3);
> -               dgr &= ~(3 << (lane * 2));
> -               dgr |= (tmp & 3) << (lane * 2);
> -       }
> -       writel(slr, rank == 0 ? &dram->rslr0 : &dram->rslr1);
> -       writel(dgr, rank == 0 ? &dram->rdgr0 : &dram->rdgr1);
> -}
> -
> -static int dramc_scan_readpipe(void)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       u32 reg_val;
> -
> -       /* data training trigger */
> -       clrbits_le32(&dram->csr, DRAM_CSR_FAILED);
> -       setbits_le32(&dram->ccr, DRAM_CCR_DATA_TRAINING);
> -
> -       /* check whether data training process has completed */
> -       await_bits_clear(&dram->ccr, DRAM_CCR_DATA_TRAINING);
> -
> -       /* check data training result */
> -       reg_val = readl(&dram->csr);
> -       if (reg_val & DRAM_CSR_FAILED)
> -               return -1;
> -
> -       return 0;
> -}
> -
> -static void dramc_clock_output_en(u32 on)
> -{
> -#if defined(CONFIG_MACH_SUN5I) || defined(CONFIG_MACH_SUN7I)
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -
> -       if (on)
> -               setbits_le32(&dram->mcr, DRAM_MCR_DCLK_OUT);
> -       else
> -               clrbits_le32(&dram->mcr, DRAM_MCR_DCLK_OUT);
> -#endif
> -#ifdef CONFIG_MACH_SUN4I
> -       struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
> -       if (on)
> -               setbits_le32(&ccm->dram_clk_cfg, CCM_DRAM_CTRL_DCLK_OUT);
> -       else
> -               clrbits_le32(&ccm->dram_clk_cfg, CCM_DRAM_CTRL_DCLK_OUT);
> -#endif
> -}
> -
> -/* tRFC in nanoseconds for different densities (from the DDR3 spec) */
> -static const u16 tRFC_DDR3_table[6] = {
> -       /* 256Mb    512Mb    1Gb      2Gb      4Gb      8Gb */
> -          90,      90,      110,     160,     300,     350
> -};
> -
> -static void dramc_set_autorefresh_cycle(u32 clk, u32 density)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       u32 tRFC, tREFI;
> -
> -       tRFC = (tRFC_DDR3_table[density] * clk + 999) / 1000;
> -       tREFI = (7987 * clk) >> 10;     /* <= 7.8us */
> -
> -       writel(DRAM_DRR_TREFI(tREFI) | DRAM_DRR_TRFC(tRFC), &dram->drr);
> -}
> -
> -/* Calculate the value for A11, A10, A9 bits in MR0 (write recovery) */
> -static u32 ddr3_write_recovery(u32 clk)
> -{
> -       u32 twr_ns = 15; /* DDR3 spec says that it is 15ns for all speed bins 
> */
> -       u32 twr_ck = (twr_ns * clk + 999) / 1000;
> -       if (twr_ck < 5)
> -               return 1;
> -       else if (twr_ck <= 8)
> -               return twr_ck - 4;
> -       else if (twr_ck <= 10)
> -               return 5;
> -       else
> -               return 6;
> -}
> -
> -/*
> - * If the dram->ppwrsctl (SDR_DPCR) register has the lowest bit set to 1, 
> this
> - * means that DRAM is currently in self-refresh mode and retaining the old
> - * data. Since we have no idea what to do in this situation yet, just set 
> this
> - * register to 0 and initialize DRAM in the same way as on any normal reboot
> - * (discarding whatever was stored there).
> - *
> - * Note: on sun7i hardware, the highest 16 bits need to be set to 0x1651 
> magic
> - * value for this write operation to have any effect. On sun5i hadware this
> - * magic value is not necessary. And on sun4i hardware the writes to this
> - * register seem to have no effect at all.
> - */
> -static void mctl_disable_power_save(void)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       writel(0x16510000, &dram->ppwrsctl);
> -}
> -
> -/*
> - * After the DRAM is powered up or reset, the DDR3 spec requires to wait at
> - * least 500 us before driving the CKE pin (Clock Enable) high. The 
> dram->idct
> - * (SDR_IDCR) register appears to configure this delay, which gets applied
> - * right at the time when the DRAM initialization is activated in the
> - * 'mctl_ddr3_initialize' function.
> - */
> -static void mctl_set_cke_delay(void)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -
> -       /* The CKE delay is represented in DRAM clock cycles, multiplied by N
> -        * (where N=2 for sun4i/sun5i and N=3 for sun7i). Here it is set to
> -        * the maximum possible value 0x1ffff, just like in the Allwinner's
> -        * boot0 bootloader. The resulting delay value is somewhere between
> -        * ~0.4 ms (sun5i with 648 MHz DRAM clock speed) and ~1.1 ms (sun7i
> -        * with 360 MHz DRAM clock speed). */
> -       setbits_le32(&dram->idcr, 0x1ffff);
> -}
> -
> -/*
> - * This triggers the DRAM initialization. It performs sending the mode 
> registers
> - * to the DRAM among other things. Very likely the ZQCL command is also 
> getting
> - * executed (to do the initial impedance calibration on the DRAM side of the
> - * wire). The memory controller and the PHY must be already configured before
> - * calling this function.
> - */
> -static void mctl_ddr3_initialize(void)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       setbits_le32(&dram->ccr, DRAM_CCR_INIT);
> -       await_bits_clear(&dram->ccr, DRAM_CCR_INIT);
> -}
> -
> -/*
> - * Perform impedance calibration on the DRAM controller side of the wire.
> - */
> -static void mctl_set_impedance(u32 zq, u32 odt_en)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       u32 reg_val;
> -       u32 zprog = zq & 0xFF, zdata = (zq >> 8) & 0xFFFFF;
> -
> -#ifndef CONFIG_MACH_SUN7I
> -       /* Appears that some kind of automatically initiated default
> -        * ZQ calibration is already in progress at this point on sun4i/sun5i
> -        * hardware, but not on sun7i. So it is reasonable to wait for its
> -        * completion before doing anything else. */
> -       await_bits_set(&dram->zqsr, DRAM_ZQSR_ZDONE);
> -#endif
> -
> -       /* ZQ calibration is not really useful unless ODT is enabled */
> -       if (!odt_en)
> -               return;
> -
> -#ifdef CONFIG_MACH_SUN7I
> -       /* Enabling ODT in SDR_IOCR on sun7i hardware results in a deadlock
> -        * unless bit 24 is set in SDR_ZQCR1. Not much is known about the
> -        * SDR_ZQCR1 register, but there are hints indicating that it might
> -        * be related to periodic impedance re-calibration. This particular
> -        * magic value is borrowed from the Allwinner boot0 bootloader, and
> -        * using it helps to avoid troubles */
> -       writel((1 << 24) | (1 << 1), &dram->zqcr1);
> -#endif
> -
> -       /* Needed at least for sun5i, because it does not self clear there */
> -       clrbits_le32(&dram->zqcr0, DRAM_ZQCR0_ZCAL);
> -
> -       if (zdata) {
> -               /* Set the user supplied impedance data */
> -               reg_val = DRAM_ZQCR0_ZDEN | zdata;
> -               writel(reg_val, &dram->zqcr0);
> -               /* no need to wait, this takes effect immediately */
> -       } else {
> -               /* Do the calibration using the external resistor */
> -               reg_val = DRAM_ZQCR0_ZCAL | DRAM_ZQCR0_IMP_DIV(zprog);
> -               writel(reg_val, &dram->zqcr0);
> -               /* Wait for the new impedance configuration to settle */
> -               await_bits_set(&dram->zqsr, DRAM_ZQSR_ZDONE);
> -       }
> -
> -       /* Needed at least for sun5i, because it does not self clear there */
> -       clrbits_le32(&dram->zqcr0, DRAM_ZQCR0_ZCAL);
> -
> -       /* Set I/O configure register */
> -       writel(DRAM_IOCR_ODT_EN(odt_en), &dram->iocr);
> -}
> -
> -static unsigned long dramc_init_helper(struct dram_para *para)
> -{
> -       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> -       u32 reg_val;
> -       u32 density;
> -       int ret_val;
> -
> -       /*
> -        * only single rank DDR3 is supported by this code even though the
> -        * hardware can theoretically support DDR2 and up to two ranks
> -        */
> -       if (para->type != DRAM_MEMORY_TYPE_DDR3 || para->rank_num != 1)
> -               return 0;
> -
> -       /* setup DRAM relative clock */
> -       mctl_setup_dram_clock(para->clock, para->mbus_clock);
> -
> -       /* Disable any pad power save control */
> -       mctl_disable_power_save();
> -
> -       mctl_set_drive();
> -
> -       /* dram clock off */
> -       dramc_clock_output_en(0);
> -
> -#ifdef CONFIG_MACH_SUN4I
> -       /* select dram controller 1 */
> -       writel(DRAM_CSEL_MAGIC, &dram->csel);
> -#endif
> -
> -       mctl_itm_disable();
> -       mctl_enable_dll0(para->tpr3);
> -
> -       /* configure external DRAM */
> -       reg_val = DRAM_DCR_TYPE_DDR3;
> -       reg_val |= DRAM_DCR_IO_WIDTH(para->io_width >> 3);
> -
> -       if (para->density == 256)
> -               density = DRAM_DCR_CHIP_DENSITY_256M;
> -       else if (para->density == 512)
> -               density = DRAM_DCR_CHIP_DENSITY_512M;
> -       else if (para->density == 1024)
> -               density = DRAM_DCR_CHIP_DENSITY_1024M;
> -       else if (para->density == 2048)
> -               density = DRAM_DCR_CHIP_DENSITY_2048M;
> -       else if (para->density == 4096)
> -               density = DRAM_DCR_CHIP_DENSITY_4096M;
> -       else if (para->density == 8192)
> -               density = DRAM_DCR_CHIP_DENSITY_8192M;
> -       else
> -               density = DRAM_DCR_CHIP_DENSITY_256M;
> -
> -       reg_val |= DRAM_DCR_CHIP_DENSITY(density);
> -       reg_val |= DRAM_DCR_BUS_WIDTH((para->bus_width >> 3) - 1);
> -       reg_val |= DRAM_DCR_RANK_SEL(para->rank_num - 1);
> -       reg_val |= DRAM_DCR_CMD_RANK_ALL;
> -       reg_val |= DRAM_DCR_MODE(DRAM_DCR_MODE_INTERLEAVE);
> -       writel(reg_val, &dram->dcr);
> -
> -       dramc_clock_output_en(1);
> -
> -       mctl_set_impedance(para->zq, para->odt_en);
> -
> -       mctl_set_cke_delay();
> -
> -       mctl_ddr3_reset();
> -
> -       udelay(1);
> -
> -       await_bits_clear(&dram->ccr, DRAM_CCR_INIT);
> -
> -       mctl_enable_dllx(para->tpr3);
> -
> -       /* set refresh period */
> -       dramc_set_autorefresh_cycle(para->clock, density);
> -
> -       /* set timing parameters */
> -       writel(para->tpr0, &dram->tpr0);
> -       writel(para->tpr1, &dram->tpr1);
> -       writel(para->tpr2, &dram->tpr2);
> -
> -       reg_val = DRAM_MR_BURST_LENGTH(0x0);
> -#if (defined(CONFIG_MACH_SUN5I) || defined(CONFIG_MACH_SUN7I))
> -       reg_val |= DRAM_MR_POWER_DOWN;
> -#endif
> -       reg_val |= DRAM_MR_CAS_LAT(para->cas - 4);
> -       reg_val |= DRAM_MR_WRITE_RECOVERY(ddr3_write_recovery(para->clock));
> -       writel(reg_val, &dram->mr);
> -
> -       writel(para->emr1, &dram->emr);
> -       writel(para->emr2, &dram->emr2);
> -       writel(para->emr3, &dram->emr3);
> -
> -       /* disable drift compensation and set passive DQS window mode */
> -       clrsetbits_le32(&dram->ccr, DRAM_CCR_DQS_DRIFT_COMP, 
> DRAM_CCR_DQS_GATE);
> -
> -#ifdef CONFIG_MACH_SUN7I
> -       /* Command rate timing mode 2T & 1T */
> -       if (para->tpr4 & 0x1)
> -               setbits_le32(&dram->ccr, DRAM_CCR_COMMAND_RATE_1T);
> -#endif
> -       /* initialize external DRAM */
> -       mctl_ddr3_initialize();
> -
> -       /* scan read pipe value */
> -       mctl_itm_enable();
> -
> -       /* Hardware DQS gate training */
> -       ret_val = dramc_scan_readpipe();
> -
> -       if (ret_val < 0)
> -               return 0;
> -
> -       /* allow to override the DQS training results with a custom delay */
> -       if (para->dqs_gating_delay)
> -               mctl_set_dqs_gating_delay(0, para->dqs_gating_delay);
> -
> -       /* set the DQS gating window type */
> -       if (para->active_windowing)
> -               clrbits_le32(&dram->ccr, DRAM_CCR_DQS_GATE);
> -       else
> -               setbits_le32(&dram->ccr, DRAM_CCR_DQS_GATE);
> -
> -       mctl_itm_reset();
> -
> -       /* configure all host port */
> -       mctl_configure_hostport();
> -
> -       return get_ram_size((long *)PHYS_SDRAM_0, PHYS_SDRAM_0_SIZE);
> -}
> -
> -unsigned long dramc_init(struct dram_para *para)
> -{
> -       unsigned long dram_size, actual_density;
> -
> -       /* If the dram configuration is not provided, use a default */
> -       if (!para)
> -               return 0;
> -
> -       /* if everything is known, then autodetection is not necessary */
> -       if (para->io_width && para->bus_width && para->density)
> -               return dramc_init_helper(para);
> -
> -       /* try to autodetect the DRAM bus width and density */
> -       para->io_width  = 16;
> -       para->bus_width = 32;
> -#if defined(CONFIG_MACH_SUN4I) || defined(CONFIG_MACH_SUN5I)
> -       /* only A0-A14 address lines on A10/A13, limiting max density to 4096 
> */
> -       para->density = 4096;
> -#else
> -       /* all A0-A15 address lines on A20, which allow density 8192 */
> -       para->density = 8192;
> -#endif
> -
> -       dram_size = dramc_init_helper(para);
> -       if (!dram_size) {
> -               /* if 32-bit bus width failed, try 16-bit bus width instead */
> -               para->bus_width = 16;
> -               dram_size = dramc_init_helper(para);
> -               if (!dram_size) {
> -                       /* if 16-bit bus width also failed, then bail out */
> -                       return dram_size;
> -               }
> -       }
> -
> -       /* check if we need to adjust the density */
> -       actual_density = (dram_size >> 17) * para->io_width / para->bus_width;
> -
> -       if (actual_density != para->density) {
> -               /* update the density and re-initialize DRAM again */
> -               para->density = actual_density;
> -               dram_size = dramc_init_helper(para);
> -       }
> -
> -       return dram_size;
> -}
> diff --git a/arch/arm/cpu/armv7/sunxi/dram_sun4i.c 
> b/arch/arm/cpu/armv7/sunxi/dram_sun4i.c
> new file mode 100644
> index 0000000..dc9fdb9
> --- /dev/null
> +++ b/arch/arm/cpu/armv7/sunxi/dram_sun4i.c
> @@ -0,0 +1,750 @@
> +/*
> + * sunxi DRAM controller initialization
> + * (C) Copyright 2012 Henrik Nordstrom <hen...@henriknordstrom.net>
> + * (C) Copyright 2013 Luke Kenneth Casson Leighton <l...@lkcl.net>
> + *
> + * Based on sun4i Linux kernel sources mach-sunxi/pm/standby/dram*.c
> + * and earlier U-Boot Allwiner A10 SPL work
> + *
> + * (C) Copyright 2007-2012
> + * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
> + * Berg Xing <bergx...@allwinnertech.com>
> + * Tom Cubie <tangli...@allwinnertech.com>
> + *
> + * SPDX-License-Identifier:    GPL-2.0+
> + */
> +
> +/*
> + * Unfortunately the only documentation we have on the sun7i DRAM
> + * controller is Allwinner boot0 + boot1 code, and that code uses
> + * magic numbers & shifts with no explanations. Hence this code is
> + * rather undocumented and full of magic.
> + */
> +
> +#include <common.h>
> +#include <asm/io.h>
> +#include <asm/arch/clock.h>
> +#include <asm/arch/dram.h>
> +#include <asm/arch/timer.h>
> +#include <asm/arch/sys_proto.h>
> +
> +#define CPU_CFG_CHIP_VER(n) ((n) << 6)
> +#define CPU_CFG_CHIP_VER_MASK CPU_CFG_CHIP_VER(0x3)
> +#define CPU_CFG_CHIP_REV_A 0x0
> +#define CPU_CFG_CHIP_REV_C1 0x1
> +#define CPU_CFG_CHIP_REV_C2 0x2
> +#define CPU_CFG_CHIP_REV_B 0x3
> +
> +/*
> + * Wait up to 1s for value to be set in given part of reg.
> + */
> +static void await_completion(u32 *reg, u32 mask, u32 val)
> +{
> +       unsigned long tmo = timer_get_us() + 1000000;
> +
> +       while ((readl(reg) & mask) != val) {
> +               if (timer_get_us() > tmo)
> +                       panic("Timeout initialising DRAM\n");
> +       }
> +}
> +
> +/*
> + * Wait up to 1s for mask to be clear in given reg.
> + */
> +static inline void await_bits_clear(u32 *reg, u32 mask)
> +{
> +       await_completion(reg, mask, 0);
> +}
> +
> +/*
> + * Wait up to 1s for mask to be set in given reg.
> + */
> +static inline void await_bits_set(u32 *reg, u32 mask)
> +{
> +       await_completion(reg, mask, mask);
> +}
> +
> +/*
> + * This performs the external DRAM reset by driving the RESET pin low and
> + * then high again. According to the DDR3 spec, the RESET pin needs to be
> + * kept low for at least 200 us.
> + */
> +static void mctl_ddr3_reset(void)
> +{
> +       struct sunxi_dram_reg *dram =
> +                       (struct sunxi_dram_reg *)SUNXI_DRAMC_BASE;
> +
> +#ifdef CONFIG_MACH_SUN4I
> +       struct sunxi_timer_reg *timer =
> +                       (struct sunxi_timer_reg *)SUNXI_TIMER_BASE;
> +       u32 reg_val;
> +
> +       writel(0, &timer->cpu_cfg);
> +       reg_val = readl(&timer->cpu_cfg);
> +
> +       if ((reg_val & CPU_CFG_CHIP_VER_MASK) !=
> +           CPU_CFG_CHIP_VER(CPU_CFG_CHIP_REV_A)) {
> +               setbits_le32(&dram->mcr, DRAM_MCR_RESET);
> +               udelay(200);
> +               clrbits_le32(&dram->mcr, DRAM_MCR_RESET);
> +       } else
> +#endif
> +       {
> +               clrbits_le32(&dram->mcr, DRAM_MCR_RESET);
> +               udelay(200);
> +               setbits_le32(&dram->mcr, DRAM_MCR_RESET);
> +       }
> +       /* After the RESET pin is de-asserted, the DDR3 spec requires to wait
> +        * for additional 500 us before driving the CKE pin (Clock Enable)
> +        * high. The duration of this delay can be configured in the SDR_IDCR
> +        * (Initialization Delay Configuration Register) and applied
> +        * automatically by the DRAM controller during the DDR3 initialization
> +        * step. But SDR_IDCR has limited range on sun4i/sun5i hardware and
> +        * can't provide sufficient delay at DRAM clock frequencies higher 
> than
> +        * 524 MHz (while Allwinner A13 supports DRAM clock frequency up to
> +        * 533 MHz according to the datasheet). Additionally, there is no
> +        * official documentation for the SDR_IDCR register anywhere, and
> +        * there is always a chance that we are interpreting it wrong.
> +        * Better be safe than sorry, so add an explicit delay here. */
> +       udelay(500);
> +}
> +
> +static void mctl_set_drive(void)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +
> +#ifdef CONFIG_MACH_SUN7I
> +       clrsetbits_le32(&dram->mcr, DRAM_MCR_MODE_NORM(0x3) | (0x3 << 28),
> +#else
> +       clrsetbits_le32(&dram->mcr, DRAM_MCR_MODE_NORM(0x3),
> +#endif
> +                       DRAM_MCR_MODE_EN(0x3) |
> +                       0xffc);
> +}
> +
> +static void mctl_itm_disable(void)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +
> +       clrsetbits_le32(&dram->ccr, DRAM_CCR_INIT, DRAM_CCR_ITM_OFF);
> +}
> +
> +static void mctl_itm_enable(void)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +
> +       clrbits_le32(&dram->ccr, DRAM_CCR_ITM_OFF);
> +}
> +
> +static void mctl_itm_reset(void)
> +{
> +       mctl_itm_disable();
> +       udelay(1); /* ITM reset needs a bit of delay */
> +       mctl_itm_enable();
> +       udelay(1);
> +}
> +
> +static void mctl_enable_dll0(u32 phase)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +
> +       clrsetbits_le32(&dram->dllcr[0], 0x3f << 6,
> +                       ((phase >> 16) & 0x3f) << 6);
> +       clrsetbits_le32(&dram->dllcr[0], DRAM_DLLCR_NRESET, 
> DRAM_DLLCR_DISABLE);
> +       udelay(2);
> +
> +       clrbits_le32(&dram->dllcr[0], DRAM_DLLCR_NRESET | DRAM_DLLCR_DISABLE);
> +       udelay(22);
> +
> +       clrsetbits_le32(&dram->dllcr[0], DRAM_DLLCR_DISABLE, 
> DRAM_DLLCR_NRESET);
> +       udelay(22);
> +}
> +
> +/* Get the number of DDR byte lanes */
> +static u32 mctl_get_number_of_lanes(void)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       if ((readl(&dram->dcr) & DRAM_DCR_BUS_WIDTH_MASK) ==
> +                               DRAM_DCR_BUS_WIDTH(DRAM_DCR_BUS_WIDTH_32BIT))
> +               return 4;
> +       else
> +               return 2;
> +}
> +
> +/*
> + * Note: This differs from pm/standby in that it checks the bus width
> + */
> +static void mctl_enable_dllx(u32 phase)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       u32 i, number_of_lanes;
> +
> +       number_of_lanes = mctl_get_number_of_lanes();
> +
> +       for (i = 1; i <= number_of_lanes; i++) {
> +               clrsetbits_le32(&dram->dllcr[i], 0xf << 14,
> +                               (phase & 0xf) << 14);
> +               clrsetbits_le32(&dram->dllcr[i], DRAM_DLLCR_NRESET,
> +                               DRAM_DLLCR_DISABLE);
> +               phase >>= 4;
> +       }
> +       udelay(2);
> +
> +       for (i = 1; i <= number_of_lanes; i++)
> +               clrbits_le32(&dram->dllcr[i], DRAM_DLLCR_NRESET |
> +                            DRAM_DLLCR_DISABLE);
> +       udelay(22);
> +
> +       for (i = 1; i <= number_of_lanes; i++)
> +               clrsetbits_le32(&dram->dllcr[i], DRAM_DLLCR_DISABLE,
> +                               DRAM_DLLCR_NRESET);
> +       udelay(22);
> +}
> +
> +static u32 hpcr_value[32] = {
> +#ifdef CONFIG_MACH_SUN5I
> +       0, 0, 0, 0,
> +       0, 0, 0, 0,
> +       0, 0, 0, 0,
> +       0, 0, 0, 0,
> +       0x1031, 0x1031, 0x0735, 0x1035,
> +       0x1035, 0x0731, 0x1031, 0,
> +       0x0301, 0x0301, 0x0301, 0x0301,
> +       0x0301, 0x0301, 0x0301, 0
> +#endif
> +#ifdef CONFIG_MACH_SUN4I
> +       0x0301, 0x0301, 0x0301, 0x0301,
> +       0x0301, 0x0301, 0, 0,
> +       0, 0, 0, 0,
> +       0, 0, 0, 0,
> +       0x1031, 0x1031, 0x0735, 0x5031,
> +       0x1035, 0x0731, 0x1031, 0x0735,
> +       0x1035, 0x1031, 0x0731, 0x1035,
> +       0x1031, 0x0301, 0x0301, 0x0731
> +#endif
> +#ifdef CONFIG_MACH_SUN7I
> +       0x0301, 0x0301, 0x0301, 0x0301,
> +       0x0301, 0x0301, 0x0301, 0x0301,
> +       0, 0, 0, 0,
> +       0, 0, 0, 0,
> +       0x1031, 0x1031, 0x0735, 0x1035,
> +       0x1035, 0x0731, 0x1031, 0x0735,
> +       0x1035, 0x1031, 0x0731, 0x1035,
> +       0x0001, 0x1031, 0, 0x1031
> +       /* last row differs from boot0 source table
> +        * 0x1031, 0x0301, 0x0301, 0x0731
> +        * but boot0 code skips #28 and #30, and sets #29 and #31 to the
> +        * value from #28 entry (0x1031)
> +        */
> +#endif
> +};
> +
> +static void mctl_configure_hostport(void)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       u32 i;
> +
> +       for (i = 0; i < 32; i++)
> +               writel(hpcr_value[i], &dram->hpcr[i]);
> +}
> +
> +static void mctl_setup_dram_clock(u32 clk, u32 mbus_clk)
> +{
> +       u32 reg_val;
> +       struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
> +       u32 pll5p_clk, pll6x_clk;
> +       u32 pll5p_div, pll6x_div;
> +       u32 pll5p_rate, pll6x_rate;
> +
> +       /* setup DRAM PLL */
> +       reg_val = readl(&ccm->pll5_cfg);
> +       reg_val &= ~CCM_PLL5_CTRL_M_MASK;               /* set M to 0 (x1) */
> +       reg_val &= ~CCM_PLL5_CTRL_K_MASK;               /* set K to 0 (x1) */
> +       reg_val &= ~CCM_PLL5_CTRL_N_MASK;               /* set N to 0 (x0) */
> +       reg_val &= ~CCM_PLL5_CTRL_P_MASK;               /* set P to 0 (x1) */
> +#ifdef CONFIG_OLD_SUNXI_KERNEL_COMPAT
> +       /* Old kernels are hardcoded to P=1 (divide by 2) */
> +       reg_val |= CCM_PLL5_CTRL_P(1);
> +#endif
> +       if (clk >= 540 && clk < 552) {
> +               /* dram = 540MHz */
> +               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
> +               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
> +               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(15));
> +       } else if (clk >= 512 && clk < 528) {
> +               /* dram = 512MHz */
> +               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3));
> +               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(4));
> +               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(16));
> +       } else if (clk >= 496 && clk < 504) {
> +               /* dram = 496MHz */
> +               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(3));
> +               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(2));
> +               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(31));
> +       } else if (clk >= 468 && clk < 480) {
> +               /* dram = 468MHz */
> +               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
> +               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
> +               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(13));
> +       } else if (clk >= 396 && clk < 408) {
> +               /* dram = 396MHz */
> +               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
> +               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(3));
> +               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(11));
> +       } else  {
> +               /* any other frequency that is a multiple of 24 */
> +               reg_val |= CCM_PLL5_CTRL_M(CCM_PLL5_CTRL_M_X(2));
> +               reg_val |= CCM_PLL5_CTRL_K(CCM_PLL5_CTRL_K_X(2));
> +               reg_val |= CCM_PLL5_CTRL_N(CCM_PLL5_CTRL_N_X(clk / 24));
> +       }
> +       reg_val &= ~CCM_PLL5_CTRL_VCO_GAIN;             /* PLL VCO Gain off */
> +       reg_val |= CCM_PLL5_CTRL_EN;                    /* PLL On */
> +       writel(reg_val, &ccm->pll5_cfg);
> +       udelay(5500);
> +
> +       setbits_le32(&ccm->pll5_cfg, CCM_PLL5_CTRL_DDR_CLK);
> +
> +#if defined(CONFIG_MACH_SUN4I) || defined(CONFIG_MACH_SUN7I)
> +       /* reset GPS */
> +       clrbits_le32(&ccm->gps_clk_cfg, CCM_GPS_CTRL_RESET | 
> CCM_GPS_CTRL_GATE);
> +       setbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_GPS);
> +       udelay(1);
> +       clrbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_GPS);
> +#endif
> +
> +       /* setup MBUS clock */
> +       if (!mbus_clk)
> +               mbus_clk = 300;
> +
> +       /* PLL5P and PLL6 are the potential clock sources for MBUS */
> +       pll6x_clk = clock_get_pll6() / 1000000;
> +#ifdef CONFIG_MACH_SUN7I
> +       pll6x_clk *= 2; /* sun7i uses PLL6*2, sun5i uses just PLL6 */
> +#endif
> +       pll5p_clk = clock_get_pll5p() / 1000000;
> +       pll6x_div = DIV_ROUND_UP(pll6x_clk, mbus_clk);
> +       pll5p_div = DIV_ROUND_UP(pll5p_clk, mbus_clk);
> +       pll6x_rate = pll6x_clk / pll6x_div;
> +       pll5p_rate = pll5p_clk / pll5p_div;
> +
> +       if (pll6x_div <= 16 && pll6x_rate > pll5p_rate) {
> +               /* use PLL6 as the MBUS clock source */
> +               reg_val = CCM_MBUS_CTRL_GATE |
> +                         CCM_MBUS_CTRL_CLK_SRC(CCM_MBUS_CTRL_CLK_SRC_PLL6) |
> +                         CCM_MBUS_CTRL_N(CCM_MBUS_CTRL_N_X(1)) |
> +                         CCM_MBUS_CTRL_M(CCM_MBUS_CTRL_M_X(pll6x_div));
> +       } else if (pll5p_div <= 16) {
> +               /* use PLL5P as the MBUS clock source */
> +               reg_val = CCM_MBUS_CTRL_GATE |
> +                         CCM_MBUS_CTRL_CLK_SRC(CCM_MBUS_CTRL_CLK_SRC_PLL5) |
> +                         CCM_MBUS_CTRL_N(CCM_MBUS_CTRL_N_X(1)) |
> +                         CCM_MBUS_CTRL_M(CCM_MBUS_CTRL_M_X(pll5p_div));
> +       } else {
> +               panic("Bad mbus_clk\n");
> +       }
> +       writel(reg_val, &ccm->mbus_clk_cfg);
> +
> +       /*
> +        * open DRAMC AHB & DLL register clock
> +        * close it first
> +        */
> +#if defined(CONFIG_MACH_SUN5I) || defined(CONFIG_MACH_SUN7I)
> +       clrbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM | CCM_AHB_GATE_DLL);
> +#else
> +       clrbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM);
> +#endif
> +       udelay(22);
> +
> +       /* then open it */
> +#if defined(CONFIG_MACH_SUN5I) || defined(CONFIG_MACH_SUN7I)
> +       setbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM | CCM_AHB_GATE_DLL);
> +#else
> +       setbits_le32(&ccm->ahb_gate0, CCM_AHB_GATE_SDRAM);
> +#endif
> +       udelay(22);
> +}
> +
> +/*
> + * The data from rslrX and rdgrX registers (X=rank) is stored
> + * in a single 32-bit value using the following format:
> + *   bits [31:26] - DQS gating system latency for byte lane 3
> + *   bits [25:24] - DQS gating phase select for byte lane 3
> + *   bits [23:18] - DQS gating system latency for byte lane 2
> + *   bits [17:16] - DQS gating phase select for byte lane 2
> + *   bits [15:10] - DQS gating system latency for byte lane 1
> + *   bits [ 9:8 ] - DQS gating phase select for byte lane 1
> + *   bits [ 7:2 ] - DQS gating system latency for byte lane 0
> + *   bits [ 1:0 ] - DQS gating phase select for byte lane 0
> + */
> +static void mctl_set_dqs_gating_delay(int rank, u32 dqs_gating_delay)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       u32 lane, number_of_lanes = mctl_get_number_of_lanes();
> +       /* rank0 gating system latency (3 bits per lane: cycles) */
> +       u32 slr = readl(rank == 0 ? &dram->rslr0 : &dram->rslr1);
> +       /* rank0 gating phase select (2 bits per lane: 90, 180, 270, 360) */
> +       u32 dgr = readl(rank == 0 ? &dram->rdgr0 : &dram->rdgr1);
> +       for (lane = 0; lane < number_of_lanes; lane++) {
> +               u32 tmp = dqs_gating_delay >> (lane * 8);
> +               slr &= ~(7 << (lane * 3));
> +               slr |= ((tmp >> 2) & 7) << (lane * 3);
> +               dgr &= ~(3 << (lane * 2));
> +               dgr |= (tmp & 3) << (lane * 2);
> +       }
> +       writel(slr, rank == 0 ? &dram->rslr0 : &dram->rslr1);
> +       writel(dgr, rank == 0 ? &dram->rdgr0 : &dram->rdgr1);
> +}
> +
> +static int dramc_scan_readpipe(void)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       u32 reg_val;
> +
> +       /* data training trigger */
> +       clrbits_le32(&dram->csr, DRAM_CSR_FAILED);
> +       setbits_le32(&dram->ccr, DRAM_CCR_DATA_TRAINING);
> +
> +       /* check whether data training process has completed */
> +       await_bits_clear(&dram->ccr, DRAM_CCR_DATA_TRAINING);
> +
> +       /* check data training result */
> +       reg_val = readl(&dram->csr);
> +       if (reg_val & DRAM_CSR_FAILED)
> +               return -1;
> +
> +       return 0;
> +}
> +
> +static void dramc_clock_output_en(u32 on)
> +{
> +#if defined(CONFIG_MACH_SUN5I) || defined(CONFIG_MACH_SUN7I)
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +
> +       if (on)
> +               setbits_le32(&dram->mcr, DRAM_MCR_DCLK_OUT);
> +       else
> +               clrbits_le32(&dram->mcr, DRAM_MCR_DCLK_OUT);
> +#endif
> +#ifdef CONFIG_MACH_SUN4I
> +       struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
> +       if (on)
> +               setbits_le32(&ccm->dram_clk_cfg, CCM_DRAM_CTRL_DCLK_OUT);
> +       else
> +               clrbits_le32(&ccm->dram_clk_cfg, CCM_DRAM_CTRL_DCLK_OUT);
> +#endif
> +}
> +
> +/* tRFC in nanoseconds for different densities (from the DDR3 spec) */
> +static const u16 tRFC_DDR3_table[6] = {
> +       /* 256Mb    512Mb    1Gb      2Gb      4Gb      8Gb */
> +          90,      90,      110,     160,     300,     350
> +};
> +
> +static void dramc_set_autorefresh_cycle(u32 clk, u32 density)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       u32 tRFC, tREFI;
> +
> +       tRFC = (tRFC_DDR3_table[density] * clk + 999) / 1000;
> +       tREFI = (7987 * clk) >> 10;     /* <= 7.8us */
> +
> +       writel(DRAM_DRR_TREFI(tREFI) | DRAM_DRR_TRFC(tRFC), &dram->drr);
> +}
> +
> +/* Calculate the value for A11, A10, A9 bits in MR0 (write recovery) */
> +static u32 ddr3_write_recovery(u32 clk)
> +{
> +       u32 twr_ns = 15; /* DDR3 spec says that it is 15ns for all speed bins 
> */
> +       u32 twr_ck = (twr_ns * clk + 999) / 1000;
> +       if (twr_ck < 5)
> +               return 1;
> +       else if (twr_ck <= 8)
> +               return twr_ck - 4;
> +       else if (twr_ck <= 10)
> +               return 5;
> +       else
> +               return 6;
> +}
> +
> +/*
> + * If the dram->ppwrsctl (SDR_DPCR) register has the lowest bit set to 1, 
> this
> + * means that DRAM is currently in self-refresh mode and retaining the old
> + * data. Since we have no idea what to do in this situation yet, just set 
> this
> + * register to 0 and initialize DRAM in the same way as on any normal reboot
> + * (discarding whatever was stored there).
> + *
> + * Note: on sun7i hardware, the highest 16 bits need to be set to 0x1651 
> magic
> + * value for this write operation to have any effect. On sun5i hadware this
> + * magic value is not necessary. And on sun4i hardware the writes to this
> + * register seem to have no effect at all.
> + */
> +static void mctl_disable_power_save(void)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       writel(0x16510000, &dram->ppwrsctl);
> +}
> +
> +/*
> + * After the DRAM is powered up or reset, the DDR3 spec requires to wait at
> + * least 500 us before driving the CKE pin (Clock Enable) high. The 
> dram->idct
> + * (SDR_IDCR) register appears to configure this delay, which gets applied
> + * right at the time when the DRAM initialization is activated in the
> + * 'mctl_ddr3_initialize' function.
> + */
> +static void mctl_set_cke_delay(void)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +
> +       /* The CKE delay is represented in DRAM clock cycles, multiplied by N
> +        * (where N=2 for sun4i/sun5i and N=3 for sun7i). Here it is set to
> +        * the maximum possible value 0x1ffff, just like in the Allwinner's
> +        * boot0 bootloader. The resulting delay value is somewhere between
> +        * ~0.4 ms (sun5i with 648 MHz DRAM clock speed) and ~1.1 ms (sun7i
> +        * with 360 MHz DRAM clock speed). */
> +       setbits_le32(&dram->idcr, 0x1ffff);
> +}
> +
> +/*
> + * This triggers the DRAM initialization. It performs sending the mode 
> registers
> + * to the DRAM among other things. Very likely the ZQCL command is also 
> getting
> + * executed (to do the initial impedance calibration on the DRAM side of the
> + * wire). The memory controller and the PHY must be already configured before
> + * calling this function.
> + */
> +static void mctl_ddr3_initialize(void)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       setbits_le32(&dram->ccr, DRAM_CCR_INIT);
> +       await_bits_clear(&dram->ccr, DRAM_CCR_INIT);
> +}
> +
> +/*
> + * Perform impedance calibration on the DRAM controller side of the wire.
> + */
> +static void mctl_set_impedance(u32 zq, u32 odt_en)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       u32 reg_val;
> +       u32 zprog = zq & 0xFF, zdata = (zq >> 8) & 0xFFFFF;
> +
> +#ifndef CONFIG_MACH_SUN7I
> +       /* Appears that some kind of automatically initiated default
> +        * ZQ calibration is already in progress at this point on sun4i/sun5i
> +        * hardware, but not on sun7i. So it is reasonable to wait for its
> +        * completion before doing anything else. */
> +       await_bits_set(&dram->zqsr, DRAM_ZQSR_ZDONE);
> +#endif
> +
> +       /* ZQ calibration is not really useful unless ODT is enabled */
> +       if (!odt_en)
> +               return;
> +
> +#ifdef CONFIG_MACH_SUN7I
> +       /* Enabling ODT in SDR_IOCR on sun7i hardware results in a deadlock
> +        * unless bit 24 is set in SDR_ZQCR1. Not much is known about the
> +        * SDR_ZQCR1 register, but there are hints indicating that it might
> +        * be related to periodic impedance re-calibration. This particular
> +        * magic value is borrowed from the Allwinner boot0 bootloader, and
> +        * using it helps to avoid troubles */
> +       writel((1 << 24) | (1 << 1), &dram->zqcr1);
> +#endif
> +
> +       /* Needed at least for sun5i, because it does not self clear there */
> +       clrbits_le32(&dram->zqcr0, DRAM_ZQCR0_ZCAL);
> +
> +       if (zdata) {
> +               /* Set the user supplied impedance data */
> +               reg_val = DRAM_ZQCR0_ZDEN | zdata;
> +               writel(reg_val, &dram->zqcr0);
> +               /* no need to wait, this takes effect immediately */
> +       } else {
> +               /* Do the calibration using the external resistor */
> +               reg_val = DRAM_ZQCR0_ZCAL | DRAM_ZQCR0_IMP_DIV(zprog);
> +               writel(reg_val, &dram->zqcr0);
> +               /* Wait for the new impedance configuration to settle */
> +               await_bits_set(&dram->zqsr, DRAM_ZQSR_ZDONE);
> +       }
> +
> +       /* Needed at least for sun5i, because it does not self clear there */
> +       clrbits_le32(&dram->zqcr0, DRAM_ZQCR0_ZCAL);
> +
> +       /* Set I/O configure register */
> +       writel(DRAM_IOCR_ODT_EN(odt_en), &dram->iocr);
> +}
> +
> +static unsigned long dramc_init_helper(struct dram_para *para)
> +{
> +       struct sunxi_dram_reg *dram = (struct sunxi_dram_reg 
> *)SUNXI_DRAMC_BASE;
> +       u32 reg_val;
> +       u32 density;
> +       int ret_val;
> +
> +       /*
> +        * only single rank DDR3 is supported by this code even though the
> +        * hardware can theoretically support DDR2 and up to two ranks
> +        */
> +       if (para->type != DRAM_MEMORY_TYPE_DDR3 || para->rank_num != 1)
> +               return 0;
> +
> +       /* setup DRAM relative clock */
> +       mctl_setup_dram_clock(para->clock, para->mbus_clock);
> +
> +       /* Disable any pad power save control */
> +       mctl_disable_power_save();
> +
> +       mctl_set_drive();
> +
> +       /* dram clock off */
> +       dramc_clock_output_en(0);
> +
> +#ifdef CONFIG_MACH_SUN4I
> +       /* select dram controller 1 */
> +       writel(DRAM_CSEL_MAGIC, &dram->csel);
> +#endif
> +
> +       mctl_itm_disable();
> +       mctl_enable_dll0(para->tpr3);
> +
> +       /* configure external DRAM */
> +       reg_val = DRAM_DCR_TYPE_DDR3;
> +       reg_val |= DRAM_DCR_IO_WIDTH(para->io_width >> 3);
> +
> +       if (para->density == 256)
> +               density = DRAM_DCR_CHIP_DENSITY_256M;
> +       else if (para->density == 512)
> +               density = DRAM_DCR_CHIP_DENSITY_512M;
> +       else if (para->density == 1024)
> +               density = DRAM_DCR_CHIP_DENSITY_1024M;
> +       else if (para->density == 2048)
> +               density = DRAM_DCR_CHIP_DENSITY_2048M;
> +       else if (para->density == 4096)
> +               density = DRAM_DCR_CHIP_DENSITY_4096M;
> +       else if (para->density == 8192)
> +               density = DRAM_DCR_CHIP_DENSITY_8192M;
> +       else
> +               density = DRAM_DCR_CHIP_DENSITY_256M;
> +
> +       reg_val |= DRAM_DCR_CHIP_DENSITY(density);
> +       reg_val |= DRAM_DCR_BUS_WIDTH((para->bus_width >> 3) - 1);
> +       reg_val |= DRAM_DCR_RANK_SEL(para->rank_num - 1);
> +       reg_val |= DRAM_DCR_CMD_RANK_ALL;
> +       reg_val |= DRAM_DCR_MODE(DRAM_DCR_MODE_INTERLEAVE);
> +       writel(reg_val, &dram->dcr);
> +
> +       dramc_clock_output_en(1);
> +
> +       mctl_set_impedance(para->zq, para->odt_en);
> +
> +       mctl_set_cke_delay();
> +
> +       mctl_ddr3_reset();
> +
> +       udelay(1);
> +
> +       await_bits_clear(&dram->ccr, DRAM_CCR_INIT);
> +
> +       mctl_enable_dllx(para->tpr3);
> +
> +       /* set refresh period */
> +       dramc_set_autorefresh_cycle(para->clock, density);
> +
> +       /* set timing parameters */
> +       writel(para->tpr0, &dram->tpr0);
> +       writel(para->tpr1, &dram->tpr1);
> +       writel(para->tpr2, &dram->tpr2);
> +
> +       reg_val = DRAM_MR_BURST_LENGTH(0x0);
> +#if (defined(CONFIG_MACH_SUN5I) || defined(CONFIG_MACH_SUN7I))
> +       reg_val |= DRAM_MR_POWER_DOWN;
> +#endif
> +       reg_val |= DRAM_MR_CAS_LAT(para->cas - 4);
> +       reg_val |= DRAM_MR_WRITE_RECOVERY(ddr3_write_recovery(para->clock));
> +       writel(reg_val, &dram->mr);
> +
> +       writel(para->emr1, &dram->emr);
> +       writel(para->emr2, &dram->emr2);
> +       writel(para->emr3, &dram->emr3);
> +
> +       /* disable drift compensation and set passive DQS window mode */
> +       clrsetbits_le32(&dram->ccr, DRAM_CCR_DQS_DRIFT_COMP, 
> DRAM_CCR_DQS_GATE);
> +
> +#ifdef CONFIG_MACH_SUN7I
> +       /* Command rate timing mode 2T & 1T */
> +       if (para->tpr4 & 0x1)
> +               setbits_le32(&dram->ccr, DRAM_CCR_COMMAND_RATE_1T);
> +#endif
> +       /* initialize external DRAM */
> +       mctl_ddr3_initialize();
> +
> +       /* scan read pipe value */
> +       mctl_itm_enable();
> +
> +       /* Hardware DQS gate training */
> +       ret_val = dramc_scan_readpipe();
> +
> +       if (ret_val < 0)
> +               return 0;
> +
> +       /* allow to override the DQS training results with a custom delay */
> +       if (para->dqs_gating_delay)
> +               mctl_set_dqs_gating_delay(0, para->dqs_gating_delay);
> +
> +       /* set the DQS gating window type */
> +       if (para->active_windowing)
> +               clrbits_le32(&dram->ccr, DRAM_CCR_DQS_GATE);
> +       else
> +               setbits_le32(&dram->ccr, DRAM_CCR_DQS_GATE);
> +
> +       mctl_itm_reset();
> +
> +       /* configure all host port */
> +       mctl_configure_hostport();
> +
> +       return get_ram_size((long *)PHYS_SDRAM_0, PHYS_SDRAM_0_SIZE);
> +}
> +
> +unsigned long dramc_init(struct dram_para *para)
> +{
> +       unsigned long dram_size, actual_density;
> +
> +       /* If the dram configuration is not provided, use a default */
> +       if (!para)
> +               return 0;
> +
> +       /* if everything is known, then autodetection is not necessary */
> +       if (para->io_width && para->bus_width && para->density)
> +               return dramc_init_helper(para);
> +
> +       /* try to autodetect the DRAM bus width and density */
> +       para->io_width  = 16;
> +       para->bus_width = 32;
> +#if defined(CONFIG_MACH_SUN4I) || defined(CONFIG_MACH_SUN5I)
> +       /* only A0-A14 address lines on A10/A13, limiting max density to 4096 
> */
> +       para->density = 4096;
> +#else
> +       /* all A0-A15 address lines on A20, which allow density 8192 */
> +       para->density = 8192;
> +#endif
> +
> +       dram_size = dramc_init_helper(para);
> +       if (!dram_size) {
> +               /* if 32-bit bus width failed, try 16-bit bus width instead */
> +               para->bus_width = 16;
> +               dram_size = dramc_init_helper(para);
> +               if (!dram_size) {
> +                       /* if 16-bit bus width also failed, then bail out */
> +                       return dram_size;
> +               }
> +       }
> +
> +       /* check if we need to adjust the density */
> +       actual_density = (dram_size >> 17) * para->io_width / para->bus_width;
> +
> +       if (actual_density != para->density) {
> +               /* update the density and re-initialize DRAM again */
> +               para->density = actual_density;
> +               dram_size = dramc_init_helper(para);
> +       }
> +
> +       return dram_size;
> +}
> diff --git a/arch/arm/include/asm/arch-sunxi/dram.h 
> b/arch/arm/include/asm/arch-sunxi/dram.h
> index 1945f75..9072e68 100644
> --- a/arch/arm/include/asm/arch-sunxi/dram.h
> +++ b/arch/arm/include/asm/arch-sunxi/dram.h
> @@ -14,172 +14,13 @@
>
>  #include <linux/types.h>
>
> -struct sunxi_dram_reg {
> -       u32 ccr;                /* 0x00 controller configuration register */
> -       u32 dcr;                /* 0x04 dram configuration register */
> -       u32 iocr;               /* 0x08 i/o configuration register */
> -       u32 csr;                /* 0x0c controller status register */
> -       u32 drr;                /* 0x10 dram refresh register */
> -       u32 tpr0;               /* 0x14 dram timing parameters register 0 */
> -       u32 tpr1;               /* 0x18 dram timing parameters register 1 */
> -       u32 tpr2;               /* 0x1c dram timing parameters register 2 */
> -       u32 gdllcr;             /* 0x20 global dll control register */
> -       u8 res0[0x28];
> -       u32 rslr0;              /* 0x4c rank system latency register */
> -       u32 rslr1;              /* 0x50 rank system latency register */
> -       u8 res1[0x8];
> -       u32 rdgr0;              /* 0x5c rank dqs gating register */
> -       u32 rdgr1;              /* 0x60 rank dqs gating register */
> -       u8 res2[0x34];
> -       u32 odtcr;              /* 0x98 odt configuration register */
> -       u32 dtr0;               /* 0x9c data training register 0 */
> -       u32 dtr1;               /* 0xa0 data training register 1 */
> -       u32 dtar;               /* 0xa4 data training address register */
> -       u32 zqcr0;              /* 0xa8 zq control register 0 */
> -       u32 zqcr1;              /* 0xac zq control register 1 */
> -       u32 zqsr;               /* 0xb0 zq status register */
> -       u32 idcr;               /* 0xb4 initializaton delay configure reg */
> -       u8 res3[0x138];
> -       u32 mr;                 /* 0x1f0 mode register */
> -       u32 emr;                /* 0x1f4 extended mode register */
> -       u32 emr2;               /* 0x1f8 extended mode register */
> -       u32 emr3;               /* 0x1fc extended mode register */
> -       u32 dllctr;             /* 0x200 dll control register */
> -       u32 dllcr[5];           /* 0x204 dll control register 0(byte 0) */
> -       /* 0x208 dll control register 1(byte 1) */
> -       /* 0x20c dll control register 2(byte 2) */
> -       /* 0x210 dll control register 3(byte 3) */
> -       /* 0x214 dll control register 4(byte 4) */
> -       u32 dqtr0;              /* 0x218 dq timing register */
> -       u32 dqtr1;              /* 0x21c dq timing register */
> -       u32 dqtr2;              /* 0x220 dq timing register */
> -       u32 dqtr3;              /* 0x224 dq timing register */
> -       u32 dqstr;              /* 0x228 dqs timing register */
> -       u32 dqsbtr;             /* 0x22c dqsb timing register */
> -       u32 mcr;                /* 0x230 mode configure register */
> -       u8 res[0x8];
> -       u32 ppwrsctl;           /* 0x23c pad power save control */
> -       u32 apr;                /* 0x240 arbiter period register */
> -       u32 pldtr;              /* 0x244 priority level data threshold reg */
> -       u8 res5[0x8];
> -       u32 hpcr[32];           /* 0x250 host port configure register */
> -       u8 res6[0x10];
> -       u32 csel;               /* 0x2e0 controller select register */
> -};
> -
> -struct dram_para {
> -       u32 clock;
> -       u32 mbus_clock;
> -       u32 type;
> -       u32 rank_num;
> -       u32 density;
> -       u32 io_width;
> -       u32 bus_width;
> -       u32 cas;
> -       u32 zq;
> -       u32 odt_en;
> -       u32 size;
> -       u32 tpr0;
> -       u32 tpr1;
> -       u32 tpr2;
> -       u32 tpr3;
> -       u32 tpr4;
> -       u32 tpr5;
> -       u32 emr1;
> -       u32 emr2;
> -       u32 emr3;
> -       u32 dqs_gating_delay;
> -       u32 active_windowing;
> -};
> -
> -#define DRAM_CCR_COMMAND_RATE_1T (0x1 << 5)
> -#define DRAM_CCR_DQS_GATE (0x1 << 14)
> -#define DRAM_CCR_DQS_DRIFT_COMP (0x1 << 17)
> -#define DRAM_CCR_ITM_OFF (0x1 << 28)
> -#define DRAM_CCR_DATA_TRAINING (0x1 << 30)
> -#define DRAM_CCR_INIT (0x1 << 31)
> -
> -#define DRAM_MEMORY_TYPE_DDR1 1
> -#define DRAM_MEMORY_TYPE_DDR2 2
> -#define DRAM_MEMORY_TYPE_DDR3 3
> -#define DRAM_MEMORY_TYPE_LPDDR2 4
> -#define DRAM_MEMORY_TYPE_LPDDR 5
> -#define DRAM_DCR_TYPE (0x1 << 0)
> -#define DRAM_DCR_TYPE_DDR2 0x0
> -#define DRAM_DCR_TYPE_DDR3 0x1
> -#define DRAM_DCR_IO_WIDTH(n) (((n) & 0x3) << 1)
> -#define DRAM_DCR_IO_WIDTH_MASK DRAM_DCR_IO_WIDTH(0x3)
> -#define DRAM_DCR_IO_WIDTH_8BIT 0x0
> -#define DRAM_DCR_IO_WIDTH_16BIT 0x1
> -#define DRAM_DCR_CHIP_DENSITY(n) (((n) & 0x7) << 3)
> -#define DRAM_DCR_CHIP_DENSITY_MASK DRAM_DCR_CHIP_DENSITY(0x7)
> -#define DRAM_DCR_CHIP_DENSITY_256M 0x0
> -#define DRAM_DCR_CHIP_DENSITY_512M 0x1
> -#define DRAM_DCR_CHIP_DENSITY_1024M 0x2
> -#define DRAM_DCR_CHIP_DENSITY_2048M 0x3
> -#define DRAM_DCR_CHIP_DENSITY_4096M 0x4
> -#define DRAM_DCR_CHIP_DENSITY_8192M 0x5
> -#define DRAM_DCR_BUS_WIDTH(n) (((n) & 0x7) << 6)
> -#define DRAM_DCR_BUS_WIDTH_MASK DRAM_DCR_BUS_WIDTH(0x7)
> -#define DRAM_DCR_BUS_WIDTH_32BIT 0x3
> -#define DRAM_DCR_BUS_WIDTH_16BIT 0x1
> -#define DRAM_DCR_BUS_WIDTH_8BIT 0x0
> -#define DRAM_DCR_RANK_SEL(n) (((n) & 0x3) << 10)
> -#define DRAM_DCR_RANK_SEL_MASK DRAM_DCR_CMD_RANK(0x3)
> -#define DRAM_DCR_CMD_RANK_ALL (0x1 << 12)
> -#define DRAM_DCR_MODE(n) (((n) & 0x3) << 13)
> -#define DRAM_DCR_MODE_MASK DRAM_DCR_MODE(0x3)
> -#define DRAM_DCR_MODE_SEQ 0x0
> -#define DRAM_DCR_MODE_INTERLEAVE 0x1
> -
> -#define DRAM_CSR_DTERR  (0x1 << 20)
> -#define DRAM_CSR_DTIERR (0x1 << 21)
> -#define DRAM_CSR_FAILED (DRAM_CSR_DTERR | DRAM_CSR_DTIERR)
> -
> -#define DRAM_DRR_TRFC(n) ((n) & 0xff)
> -#define DRAM_DRR_TREFI(n) (((n) & 0xffff) << 8)
> -#define DRAM_DRR_BURST(n) ((((n) - 1) & 0xf) << 24)
> -
> -#define DRAM_MCR_MODE_NORM(n) (((n) & 0x3) << 0)
> -#define DRAM_MCR_MODE_NORM_MASK DRAM_MCR_MOD_NORM(0x3)
> -#define DRAM_MCR_MODE_DQ_OUT(n) (((n) & 0x3) << 2)
> -#define DRAM_MCR_MODE_DQ_OUT_MASK DRAM_MCR_MODE_DQ_OUT(0x3)
> -#define DRAM_MCR_MODE_ADDR_OUT(n) (((n) & 0x3) << 4)
> -#define DRAM_MCR_MODE_ADDR_OUT_MASK DRAM_MCR_MODE_ADDR_OUT(0x3)
> -#define DRAM_MCR_MODE_DQ_IN_OUT(n) (((n) & 0x3) << 6)
> -#define DRAM_MCR_MODE_DQ_IN_OUT_MASK DRAM_MCR_MODE_DQ_IN_OUT(0x3)
> -#define DRAM_MCR_MODE_DQ_TURNON_DELAY(n) (((n) & 0x7) << 8)
> -#define DRAM_MCR_MODE_DQ_TURNON_DELAY_MASK DRAM_MCR_MODE_DQ_TURNON_DELAY(0x7)
> -#define DRAM_MCR_MODE_ADDR_IN (0x1 << 11)
> -#define DRAM_MCR_RESET (0x1 << 12)
> -#define DRAM_MCR_MODE_EN(n) (((n) & 0x3) << 13)
> -#define DRAM_MCR_MODE_EN_MASK DRAM_MCR_MOD_EN(0x3)
> -#define DRAM_MCR_DCLK_OUT (0x1 << 16)
> -
> -#define DRAM_DLLCR_NRESET (0x1 << 30)
> -#define DRAM_DLLCR_DISABLE (0x1 << 31)
> -
> -#define DRAM_ZQCR0_IMP_DIV(n) (((n) & 0xff) << 20)
> -#define DRAM_ZQCR0_IMP_DIV_MASK DRAM_ZQCR0_IMP_DIV(0xff)
> -#define DRAM_ZQCR0_ZCAL (1 << 31) /* Starts ZQ calibration when set to 1 */
> -#define DRAM_ZQCR0_ZDEN (1 << 28) /* Uses ZDATA instead of doing calibration 
> */
> -
> -#define DRAM_ZQSR_ZDONE (1 << 31) /* ZQ calibration completion flag */
> -
> -#define DRAM_IOCR_ODT_EN(n) ((((n) & 0x3) << 30) | ((n) & 0x3) << 0)
> -#define DRAM_IOCR_ODT_EN_MASK DRAM_IOCR_ODT_EN(0x3)
> -
> -#define DRAM_MR_BURST_LENGTH(n) (((n) & 0x7) << 0)
> -#define DRAM_MR_BURST_LENGTH_MASK DRAM_MR_BURST_LENGTH(0x7)
> -#define DRAM_MR_CAS_LAT(n) (((n) & 0x7) << 4)
> -#define DRAM_MR_CAS_LAT_MASK DRAM_MR_CAS_LAT(0x7)
> -#define DRAM_MR_WRITE_RECOVERY(n) (((n) & 0x7) << 9)
> -#define DRAM_MR_WRITE_RECOVERY_MASK DRAM_MR_WRITE_RECOVERY(0x7)
> -#define DRAM_MR_POWER_DOWN (0x1 << 12)
> -
> -#define DRAM_CSEL_MAGIC 0x16237495
> +/* dram regs definition */
> +#if defined(CONFIG_MACH_SUN6I)
> +#include <asm/arch/dram_sun6i.h>
> +#else
> +#include <asm/arch/dram_sun4i.h>
> +#endif
>
>  unsigned long sunxi_dram_init(void);
> -unsigned long dramc_init(struct dram_para *para);
>
>  #endif /* _SUNXI_DRAM_H */
> diff --git a/arch/arm/include/asm/arch-sunxi/dram_sun4i.h 
> b/arch/arm/include/asm/arch-sunxi/dram_sun4i.h
> new file mode 100644
> index 0000000..6c1ec5b
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-sunxi/dram_sun4i.h
> @@ -0,0 +1,182 @@
> +/*
> + * (C) Copyright 2007-2012
> + * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
> + * Berg Xing <bergx...@allwinnertech.com>
> + * Tom Cubie <tangli...@allwinnertech.com>
> + *
> + * Sunxi platform dram register definition.
> + *
> + * SPDX-License-Identifier:    GPL-2.0+
> + */
> +
> +#ifndef _SUNXI_DRAM_SUN4I_H
> +#define _SUNXI_DRAM_SUN4I_H
> +
> +struct sunxi_dram_reg {
> +       u32 ccr;                /* 0x00 controller configuration register */
> +       u32 dcr;                /* 0x04 dram configuration register */
> +       u32 iocr;               /* 0x08 i/o configuration register */
> +       u32 csr;                /* 0x0c controller status register */
> +       u32 drr;                /* 0x10 dram refresh register */
> +       u32 tpr0;               /* 0x14 dram timing parameters register 0 */
> +       u32 tpr1;               /* 0x18 dram timing parameters register 1 */
> +       u32 tpr2;               /* 0x1c dram timing parameters register 2 */
> +       u32 gdllcr;             /* 0x20 global dll control register */
> +       u8 res0[0x28];
> +       u32 rslr0;              /* 0x4c rank system latency register */
> +       u32 rslr1;              /* 0x50 rank system latency register */
> +       u8 res1[0x8];
> +       u32 rdgr0;              /* 0x5c rank dqs gating register */
> +       u32 rdgr1;              /* 0x60 rank dqs gating register */
> +       u8 res2[0x34];
> +       u32 odtcr;              /* 0x98 odt configuration register */
> +       u32 dtr0;               /* 0x9c data training register 0 */
> +       u32 dtr1;               /* 0xa0 data training register 1 */
> +       u32 dtar;               /* 0xa4 data training address register */
> +       u32 zqcr0;              /* 0xa8 zq control register 0 */
> +       u32 zqcr1;              /* 0xac zq control register 1 */
> +       u32 zqsr;               /* 0xb0 zq status register */
> +       u32 idcr;               /* 0xb4 initializaton delay configure reg */
> +       u8 res3[0x138];
> +       u32 mr;                 /* 0x1f0 mode register */
> +       u32 emr;                /* 0x1f4 extended mode register */
> +       u32 emr2;               /* 0x1f8 extended mode register */
> +       u32 emr3;               /* 0x1fc extended mode register */
> +       u32 dllctr;             /* 0x200 dll control register */
> +       u32 dllcr[5];           /* 0x204 dll control register 0(byte 0) */
> +       /* 0x208 dll control register 1(byte 1) */
> +       /* 0x20c dll control register 2(byte 2) */
> +       /* 0x210 dll control register 3(byte 3) */
> +       /* 0x214 dll control register 4(byte 4) */
> +       u32 dqtr0;              /* 0x218 dq timing register */
> +       u32 dqtr1;              /* 0x21c dq timing register */
> +       u32 dqtr2;              /* 0x220 dq timing register */
> +       u32 dqtr3;              /* 0x224 dq timing register */
> +       u32 dqstr;              /* 0x228 dqs timing register */
> +       u32 dqsbtr;             /* 0x22c dqsb timing register */
> +       u32 mcr;                /* 0x230 mode configure register */
> +       u8 res[0x8];
> +       u32 ppwrsctl;           /* 0x23c pad power save control */
> +       u32 apr;                /* 0x240 arbiter period register */
> +       u32 pldtr;              /* 0x244 priority level data threshold reg */
> +       u8 res5[0x8];
> +       u32 hpcr[32];           /* 0x250 host port configure register */
> +       u8 res6[0x10];
> +       u32 csel;               /* 0x2e0 controller select register */
> +};
> +
> +struct dram_para {
> +       u32 clock;
> +       u32 mbus_clock;
> +       u32 type;
> +       u32 rank_num;
> +       u32 density;
> +       u32 io_width;
> +       u32 bus_width;
> +       u32 cas;
> +       u32 zq;
> +       u32 odt_en;
> +       u32 size;
> +       u32 tpr0;
> +       u32 tpr1;
> +       u32 tpr2;
> +       u32 tpr3;
> +       u32 tpr4;
> +       u32 tpr5;
> +       u32 emr1;
> +       u32 emr2;
> +       u32 emr3;
> +       u32 dqs_gating_delay;
> +       u32 active_windowing;
> +};
> +
> +#define DRAM_CCR_COMMAND_RATE_1T (0x1 << 5)
> +#define DRAM_CCR_DQS_GATE (0x1 << 14)
> +#define DRAM_CCR_DQS_DRIFT_COMP (0x1 << 17)
> +#define DRAM_CCR_ITM_OFF (0x1 << 28)
> +#define DRAM_CCR_DATA_TRAINING (0x1 << 30)
> +#define DRAM_CCR_INIT (0x1 << 31)
> +
> +#define DRAM_MEMORY_TYPE_DDR1 1
> +#define DRAM_MEMORY_TYPE_DDR2 2
> +#define DRAM_MEMORY_TYPE_DDR3 3
> +#define DRAM_MEMORY_TYPE_LPDDR2 4
> +#define DRAM_MEMORY_TYPE_LPDDR 5
> +#define DRAM_DCR_TYPE (0x1 << 0)
> +#define DRAM_DCR_TYPE_DDR2 0x0
> +#define DRAM_DCR_TYPE_DDR3 0x1
> +#define DRAM_DCR_IO_WIDTH(n) (((n) & 0x3) << 1)
> +#define DRAM_DCR_IO_WIDTH_MASK DRAM_DCR_IO_WIDTH(0x3)
> +#define DRAM_DCR_IO_WIDTH_8BIT 0x0
> +#define DRAM_DCR_IO_WIDTH_16BIT 0x1
> +#define DRAM_DCR_CHIP_DENSITY(n) (((n) & 0x7) << 3)
> +#define DRAM_DCR_CHIP_DENSITY_MASK DRAM_DCR_CHIP_DENSITY(0x7)
> +#define DRAM_DCR_CHIP_DENSITY_256M 0x0
> +#define DRAM_DCR_CHIP_DENSITY_512M 0x1
> +#define DRAM_DCR_CHIP_DENSITY_1024M 0x2
> +#define DRAM_DCR_CHIP_DENSITY_2048M 0x3
> +#define DRAM_DCR_CHIP_DENSITY_4096M 0x4
> +#define DRAM_DCR_CHIP_DENSITY_8192M 0x5
> +#define DRAM_DCR_BUS_WIDTH(n) (((n) & 0x7) << 6)
> +#define DRAM_DCR_BUS_WIDTH_MASK DRAM_DCR_BUS_WIDTH(0x7)
> +#define DRAM_DCR_BUS_WIDTH_32BIT 0x3
> +#define DRAM_DCR_BUS_WIDTH_16BIT 0x1
> +#define DRAM_DCR_BUS_WIDTH_8BIT 0x0
> +#define DRAM_DCR_RANK_SEL(n) (((n) & 0x3) << 10)
> +#define DRAM_DCR_RANK_SEL_MASK DRAM_DCR_CMD_RANK(0x3)
> +#define DRAM_DCR_CMD_RANK_ALL (0x1 << 12)
> +#define DRAM_DCR_MODE(n) (((n) & 0x3) << 13)
> +#define DRAM_DCR_MODE_MASK DRAM_DCR_MODE(0x3)
> +#define DRAM_DCR_MODE_SEQ 0x0
> +#define DRAM_DCR_MODE_INTERLEAVE 0x1
> +
> +#define DRAM_CSR_DTERR  (0x1 << 20)
> +#define DRAM_CSR_DTIERR (0x1 << 21)
> +#define DRAM_CSR_FAILED (DRAM_CSR_DTERR | DRAM_CSR_DTIERR)
> +
> +#define DRAM_DRR_TRFC(n) ((n) & 0xff)
> +#define DRAM_DRR_TREFI(n) (((n) & 0xffff) << 8)
> +#define DRAM_DRR_BURST(n) ((((n) - 1) & 0xf) << 24)
> +
> +#define DRAM_MCR_MODE_NORM(n) (((n) & 0x3) << 0)
> +#define DRAM_MCR_MODE_NORM_MASK DRAM_MCR_MOD_NORM(0x3)
> +#define DRAM_MCR_MODE_DQ_OUT(n) (((n) & 0x3) << 2)
> +#define DRAM_MCR_MODE_DQ_OUT_MASK DRAM_MCR_MODE_DQ_OUT(0x3)
> +#define DRAM_MCR_MODE_ADDR_OUT(n) (((n) & 0x3) << 4)
> +#define DRAM_MCR_MODE_ADDR_OUT_MASK DRAM_MCR_MODE_ADDR_OUT(0x3)
> +#define DRAM_MCR_MODE_DQ_IN_OUT(n) (((n) & 0x3) << 6)
> +#define DRAM_MCR_MODE_DQ_IN_OUT_MASK DRAM_MCR_MODE_DQ_IN_OUT(0x3)
> +#define DRAM_MCR_MODE_DQ_TURNON_DELAY(n) (((n) & 0x7) << 8)
> +#define DRAM_MCR_MODE_DQ_TURNON_DELAY_MASK DRAM_MCR_MODE_DQ_TURNON_DELAY(0x7)
> +#define DRAM_MCR_MODE_ADDR_IN (0x1 << 11)
> +#define DRAM_MCR_RESET (0x1 << 12)
> +#define DRAM_MCR_MODE_EN(n) (((n) & 0x3) << 13)
> +#define DRAM_MCR_MODE_EN_MASK DRAM_MCR_MOD_EN(0x3)
> +#define DRAM_MCR_DCLK_OUT (0x1 << 16)
> +
> +#define DRAM_DLLCR_NRESET (0x1 << 30)
> +#define DRAM_DLLCR_DISABLE (0x1 << 31)
> +
> +#define DRAM_ZQCR0_IMP_DIV(n) (((n) & 0xff) << 20)
> +#define DRAM_ZQCR0_IMP_DIV_MASK DRAM_ZQCR0_IMP_DIV(0xff)
> +#define DRAM_ZQCR0_ZCAL (1 << 31) /* Starts ZQ calibration when set to 1 */
> +#define DRAM_ZQCR0_ZDEN (1 << 28) /* Uses ZDATA instead of doing calibration 
> */
> +
> +#define DRAM_ZQSR_ZDONE (1 << 31) /* ZQ calibration completion flag */
> +
> +#define DRAM_IOCR_ODT_EN(n) ((((n) & 0x3) << 30) | ((n) & 0x3) << 0)
> +#define DRAM_IOCR_ODT_EN_MASK DRAM_IOCR_ODT_EN(0x3)
> +
> +#define DRAM_MR_BURST_LENGTH(n) (((n) & 0x7) << 0)
> +#define DRAM_MR_BURST_LENGTH_MASK DRAM_MR_BURST_LENGTH(0x7)
> +#define DRAM_MR_CAS_LAT(n) (((n) & 0x7) << 4)
> +#define DRAM_MR_CAS_LAT_MASK DRAM_MR_CAS_LAT(0x7)
> +#define DRAM_MR_WRITE_RECOVERY(n) (((n) & 0x7) << 9)
> +#define DRAM_MR_WRITE_RECOVERY_MASK DRAM_MR_WRITE_RECOVERY(0x7)
> +#define DRAM_MR_POWER_DOWN (0x1 << 12)
> +
> +#define DRAM_CSEL_MAGIC 0x16237495
> +
> +unsigned long dramc_init(struct dram_para *para);
> +
> +#endif /* _SUNXI_DRAM_SUN4I_H */
> --
> 2.1.0
>
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